Thank you for your query.
If your pregnancy
test was negative, then your chances of being pregnant are very less.
Also, you would be visiting your gynecologist soon for re insertion.
At that visit, ask her to first scan you for pregnancy.
Just having acid reflux
and other symptoms cannot confirm a pregnancy.
Also, if you would have been pregnant, your doctor would have told you so on Monday , when you had a check up.
You have not mentioned the dates of your period etc so its very difficult to opine.
COnsult your gynecologist regarding this issue before re insertion.
Please use protection meanwhile.